We are phasing out the attribute circumference due to many issues with incorrect measurements. That data is still there for now, but starting on March 1 this field will be discontinued and data no longer available in our feeds.

Meanwhile, we continue to have the width attribute which represents width of solid items like dildos and butt plugs.And we are also introducing a new attribute soon called "inner diameter" which will be used to describe the insert-able space in things like cock rings, and penis extensions.